content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2012, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
   * Other names may be trademarks of their respective owners.]
   *
   * ---------------------------------
   * BoxAndWhiskerCalculatorTests.java
   * ---------------------------------
   * (C) Copyright 2003-2008, by Object Refinery Limited and Contributors.
   *
   * Original Author:  David Gilbert (for Object Refinery Limited);
   * Contributor(s):   -;
   *
   * Changes
   * -------
   * 28-Aug-2003 : Version 1 (DG);
   *
   */
  
  package org.jfree.data.statistics;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  import static org.junit.jupiter.api.Assertions.fail;
  
  import java.util.ArrayList;
  import java.util.List;
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests for the {@link BoxAndWhiskerCalculator} class.
   */
  public class BoxAndWhiskerCalculatorTest  {
  
  
  
  
  
      /**
       * Some checks for the calculateBoxAndWhiskerStatistics() method.
       */
      @Test
      public void testCalculateBoxAndWhiskerStatistics() {
  
          // try null list
          try {
              BoxAndWhiskerCalculator.calculateBoxAndWhiskerStatistics(null);
              fail("IllegalArgumentException should have been thrown on a null key");
          }
          catch (IllegalArgumentException e) {
              assertEquals("Null 'values' argument.", e.getMessage());
          }
  
          // try a list containing a single value
          List<Number> values = new ArrayList<Number>();
          values.add(1.1);
          BoxAndWhiskerItem item
              = BoxAndWhiskerCalculator.calculateBoxAndWhiskerStatistics(values);
          assertEquals(1.1, item.getMean().doubleValue(), EPSILON);
          assertEquals(1.1, item.getMedian().doubleValue(), EPSILON);
          assertEquals(1.1, item.getQ1().doubleValue(), EPSILON);
          assertEquals(1.1, item.getQ3().doubleValue(), EPSILON);
      }
  
      private static final double EPSILON = 0.000000001;
  
      /**
       * Tests the Q1 calculation.
       */
      @Test
      public void testCalculateQ1() {
  
          // try null argument
          try {
              BoxAndWhiskerCalculator.calculateQ1(null);
              fail("IllegalArgumentException should have been thrown on a null key");
          }
          catch (IllegalArgumentException e) {
              assertEquals("Null 'values' argument.", e.getMessage());
          }
  
          List<Number> values = new ArrayList<Number>();
          double q1 = BoxAndWhiskerCalculator.calculateQ1(values);
          assertTrue(Double.isNaN(q1));
          values.add(1.0);
          q1 = BoxAndWhiskerCalculator.calculateQ1(values);
          assertEquals(q1, 1.0, EPSILON);
          values.add(2.0);
          q1 = BoxAndWhiskerCalculator.calculateQ1(values);
          assertEquals(q1, 1.0, EPSILON);
          values.add(3.0);
          q1 = BoxAndWhiskerCalculator.calculateQ1(values);
          assertEquals(q1, 1.5, EPSILON);
          values.add(4.0);
          q1 = BoxAndWhiskerCalculator.calculateQ1(values);
          assertEquals(q1, 1.5, EPSILON);
      }
  
      /**
       * Tests the Q3 calculation.
       */
      @Test
      public void testCalculateQ3() {
          // try null argument
  
          try {
              BoxAndWhiskerCalculator.calculateQ3(null);
              fail("IllegalArgumentException should have been thrown on a null key");
          }
          catch (IllegalArgumentException e) {
              assertEquals("Null 'values' argument.", e.getMessage());
          }
  
          List<Number> values = new ArrayList<Number>();
          double q3 = BoxAndWhiskerCalculator.calculateQ3(values);
          assertTrue(Double.isNaN(q3));
          values.add(1.0);
          q3 = BoxAndWhiskerCalculator.calculateQ3(values);
          assertEquals(q3, 1.0, EPSILON);
          values.add(2.0);
          q3 = BoxAndWhiskerCalculator.calculateQ3(values);
          assertEquals(q3, 2.0, EPSILON);
          values.add(3.0);
          q3 = BoxAndWhiskerCalculator.calculateQ3(values);
          assertEquals(q3, 2.5, EPSILON);
          values.add(4.0);
          q3 = BoxAndWhiskerCalculator.calculateQ3(values);
          assertEquals(q3, 3.5, EPSILON);
      }
  
      /**
       * The test case included in bug report 1593149.
       */
      @Test
      public void test1593149() {
          ArrayList<Number> theList = new ArrayList<Number>(5);
          theList.add(0, 1.0);
          theList.add(1, 2.0);
          theList.add(2, Double.NaN);
          theList.add(3, 3.0);
          theList.add(4, 4.0);
          BoxAndWhiskerItem theItem =
              BoxAndWhiskerCalculator.calculateBoxAndWhiskerStatistics(theList);
          assertEquals(1.0, theItem.getMinRegularValue().doubleValue(), EPSILON);
          assertEquals(4.0, theItem.getMaxRegularValue().doubleValue(), EPSILON);
      }
  }
  